Valve



Feb. 25, 1941.

E. c. BRISBANE 2,232,901

VALVE Filed June 23, 1959 5 Sheets-Sheet o u U m normm. VALVE CLOSING CONTROLS Zinnentor EUGENE C. BRISBANE MLAM Feb. 25, 1941. c BRlSBANE 2,232,901

VALVE Filed June 23, 1959 v 5 Sheets-Sheet 2 -EIUGENE c. BRISBANE WMQ.

(Zttorneg Feb. 25, 1941. E. c. BRISBANE VALVE 5 Sheets-Sheet 3 Filed June 23, 1939 :m mm mm. 8 \E #w 5 1 3 .M N cm 8. mg N3 0/ wmm ma ma E mm 1 a: 6 LE EN m3 6% g m2 mm oq P QR 3 EN mm 5 mg 5 Q E PEN 8w w: v N mmm J W 1] Q 8N ma mNN E mmw r EN NE 8% ENN EN 8. 5 .mm wwm 1 E ax E y o E EN m 8? 0% aw E 9mm m 0% NE m EUGENE c. BRISBANE attorney Feb. 25, 1941. E. c. BRISBANE VALVE Filed June 23, 1939 5 Sheets-Sheet 5 E m: g gm mm mm 1% w m: m: v mm WQ 6 8 mm 35 y S a w 8. E w: c i w 2 9 mm 5 5. mm 5 5 8mm R mm mm. m i om m: mo? 8 8. om IL'I QR m fiur EUGENE C. BRISBANE (Kttorneg Patented Feb. 25, 1941 UNITED STATES PATENT OFFICE VALVE tion of Pennsylvania Application June 23, 1939, Serial No. 280,690

44 Claims.

This invention relates to valves and more particularly to valves of the automatically operable type which are commonly installed in pipe lines or conduits on the discharge side of a pump or other means which delivers fluid under pressure to the pipe line, for the purpose of shutting oil communication through the pipe when the pump is shut down or ceases to function, in order to prevent back flow of fluid to the pump.

An object of the invention is to provide an improved control system for automatically operable valves in which the valve operating mechanism functions to effect closing of the valve at a predetermined rate under normal conditions, and in which, under emergency conditions, the closing of the valve is effected at a rapid rate.

The invention is particularly applicable for use with automatic conical plug valves of the type shown in my Patent No. 2,078,231, granted April 27, 1937.

Briefly described, the improved valve control system of the present invention comprises a pump operated by an electric motor, a fluid pressure operated plug valve which is installed in the pipe line on the discharge side of the pump,

control mechanism for the valve, electric circuits interconnected with the pump motor and the valve control mechanism for automatically controlling the position of the valve plug according to normal operating conditions of the pump, and auxiliary electric circuits for effecting operation of the valve control mechanism under emergency conditions. The control mechanism under normal conditions functions to effect opening or closing of the valve at a substantially uniform rate, the total time of operation of the valve from fully closed 'to fully open position or vice versa being approximately forty seconds. When an emergency condition arises, such as failure of electric power supply to the main pump motor, an auxiliary emergency trip switch is adapted to be actuated so as to efiect operation of an auxiliary control mechanism which is adapted to effect closing of the valve at a rapid rate. The rate of the main valve closing movement under the auxiliary control is such that the total time of operation from the fully opened position to an angular position of the plug halfway between open position and cut-off position is approximately four seconds. The cut-oflf position of the valve plug is the angular position at which the waterway opening through the plug at the smaller diameter end no longer overlaps any portion of the corresponding circular opening through the valve body. The rate of closing during the latter part of the'rapid emergency c1os-. ing movement of the plug is retarded sufficiently so as to prevent injury to the valve or jamming of the plug in closed position.

Other objects and advantages of this invention will be more apparent from the following detailed description of certain approved forms of apparatus constructed and operating according to the principles of this invention.

In the accompanying drawings:

Figure 1 is a diagrammatic view, partly in sec-, tion, of a valve control system embodying the present invention;

Figs. 2, 3, 4 and 5 are enlarged views of the wiring diagrams and associated parts shown in Fig. 1.

From a suitable source of supply, the motor driven pump H is adapted to deliver fluid to a pipe line l2.

At the discharge side of the pump ii, there is installed a valve l3 for the purpose of controlling communication through the pipe line 12.

. The valve l3 has a rotatable plug M with a waterway I5 formed therein.

The plug I4 is adapted to be rotated by suitable mechanism. In the present instance; the plug operating mechanism is shown as comprising a sector l6 which is fixed to one end oi the stem of the valve plug II and has teeth in meshing relationship with the teeth of a rack bar I'l.

One end of therack bar I1 is connected to an end of the rod l8 of a piston l9 mounted in a cylinder 20.

Reciprocation of the piston is within the cylinder is adapted to turn the plug I4 through an angle of approximately 90 so as to position the waterway l5 of the plug l4, whereby thefiow of fluid through the pipe line I2 is either cut off or permitted.

For the purpose of controlling the operation of the piston IS, a suitable control valve device 2| is employed.

The control valve 2| in turn is under the control of a pilot valve 22.

As shown in ,Fig. 2, the control valve device 2| 45 comprises a casing formed. with a cylindrical bore 23, in which is mounted the plunger 24 of a piston valve, said plunger having a pair of spaced heads 26 and 21, and the piston valve having a piston mounted in a bore 28. The 50 piston valve has a stem 29 which extends through the casing of the control valve device 2| for a purpose to be hereinafter more fully described.

The piston chamber 30 is connected to a port 3| of the control valve 2| by a pipe 32, and the 55 piston chamber 33 on the other side of the piston I9 is connected to a port 34 of the control valve 2| by a pipe 35.

Normally the piston valve heads 26 and 21 lap the ports 3| and 34, respectively, thereby cutting off the supply of fluid under pressure to cylinder 28, so that the piston I9 will be retained in a predetermined position.

The pilot valve device 22 comprises a plunger 36 having a pair of spaced heads 31 and 38, said plunger being mounted in a cylindrical bore which is divided by the heads 31 and 38 into three chambers 39, 48 and 4|.

The chambers 39 and 4| are connected by ports 42 and 43 and a passage 44.

The port 45 of the pilot valve 22 is connected to a port 46 of the piston chamber 41 of the control valve 2| by a passage 48.

The chamber 48 on the other side of the piston 25 is connected to pilot valve port 58 by a passage 5|.

Normally the heads 31 and 38 of the pilot valve 22 lap the ports 45 and 58, as shown in Fig. 2.

The heads 26 and 21 divide the bore 23 into a plurality of chambers 52, 53 and 54.

The chambers 48 and 53 are both connected to a supply of fluid under pressure, such as a tank 55, by a pipe 56 and passages 51 and 58, which connect said pipe with said chambers, respectively.

A sump tank 59 is adapted to receive surplus fluid from the apparatus, and in order that the fluid can be returned to the pressure tank 55, the sump tank 58 is connected to the pressure tank by a pipe 68, a pump 6| being operatively connected to said pipe, as shown in Fig. 1, for withdrawing fluid from the sump tank 59 and delivering fluid to the tank 55 under predetermined pressure.

The chambers 39, 4|, 52 and 54, are respectively connected to a pipe 62 leading to the sump tank 59, by passages 63, 64 and 65.

The plunger 36 of the pilot valve 22 has a stem 66 which extends through the casing of said valve device and is connected to the intermediate portion of a floating lever 61.

One end of the floating lever 61 is pivotally connected to the stem 28 of the control valve plunger 24, as indicated at 68, Fig. 2.

The other end of the floating lever 61 extends outwardly beyond the stem 66 a suitable distance so as to be operatively associated with an actuating member 69.

The piston rod I8 extends through the cylinder 28 and has connected thereto one end of a cable 18.

The other end of the cable 18 is connected to an end of a reciprocable member 1| having a cam surface 12 adapted to be engaged by the upper end of the stem 28 of the plunger 24 during operation of the apparatus as will be hereinafter more fully described.

The other end of the cam member 1| is connected by a cable 13 to a drum 14 fixed to the shaft 15 of an electric motor 16.

The cable 13 carries an arm 11 for a purpose to be hereinafter more fully described.

The cable 13, at a convenient point between the cam member 1| and the drum 14 passes around a pulley 18 which is connected to the free end portion of the floating lever 61 by resilient means, such as a spring 19.

Referring to Figs. 1 and 5,.the pump II is driven by a synchronous motor 8I.

ply three-phase electric energy from a suitable source of supply to the fixed contacts 85, 86 and 81 of a main pump motor switch mechanism 88. Other fixed contacts 89, 88 and 8I of this switch 'mechapism are connected to the terminals of the motor 8|, by conductors 82, 93 and 84, respectively.

The motor switch mechanism 88 comprises movable contacts 85, 96 and 81 adapted to connect contacts 85, 86 and 81 with contacts 88, 98 and 9|, respectively, and also a movable contact 88 adapted to connect the fixed contacts 99 and I88 of another electric circuit to be hereinafter referred to.

The movable contacts of the switch mechanism 88 are adapted to be actuated by either of two solenoid coils I8I and I82.

The coil I8I, which is termed the closing coil, is energized through a circuit extending from positive main I83, through coil I8I, wire I84, push button switch I85, wire I86, interlock switch device I81, and wire I88 to the negative main I89.

The push button switch I is normally open, as shown in Fig. 1 and'is adapted to be actuated to close the circuit by connecting wires I84 and I86 when the pump II is to be started.

The interlock switch device I81 comprises a manually operable stem III carrying a pair of movable contacts II2 and H3. The contact II2 connects the fixed contacts 4 and II5 to which the wires I86 and I88 are connected, respectively. The contact II3 connects the flxed contacts H6 and 1 to which the wires H8 and I I9, respectively, are connected.

A bar I28 havingan opening I2I therein is slidably mounted in any suitable manner. One end of the bar I28 is connected to the cable 18 heretofore referred to, by a cable I22. Means, such as a weight I23 connected to the other end of the bar I28, by a cable I24, act to keep the bar correctly positioned and the cable I2 taut.

An actuator I 25, normally positioned above the bar, has a stem adapted to be moved downwardly through the opening I2I and engage the stem III for the pu pose of disconnecting the movable contacts II2 and 3 from therespective flxed contacts, when it is desired to open the motor circuit. However, under normal operating conditions the interlock switch device I81 is in the closed position show in Fig. 1.

The coil I82, which is termed the tripping coil, is energized through a circuit including the positive main I83 and the negative main I88, I 89, in the manner to be hereinafter referred to. One terminal of the coil I82 is connected to the negative main I88, by a wire I26, as shown in Fig. 5.

The movable contact I21 of the time delayed relay switch mechanism I28 is adapted to be actuated by a time delayed solenoid coil I29.

One terminal of .the coil I29 is connected to the fixed contact 99, by a wire I38, and the other terminal of said coil is connected to the positive main I83 by a wire I3I The negative main I89 is connected to the flxed terminal I 88 by wires I88, I26 and I32.

When the coil I28 is energized, the movable contact I21 connects the fixed contacts I33 and The contact I34 is connected to the wire I3I by a wire I35.

The contact I33 is connected to one terminal of a cofl I36 of a motor fleld switch mechanism I31, by a wire I38. The other terminal of the coil I38 is connected to the wire I28, by a wire I38.

The motor field switch mechanism I31 comprises movable contacts I40 and MI, the contact I40 being adapted to connect the fixed contacts I42 and I43, and the contact In being adapted to connect the fixed contacts I44 and I45. I

The movable contacts I40 and MI are adapted to be actuated by either the solenoid coil I36,

or a solenoid coil I46.

One terminal of the motor field I41 is connected to a positive main I48, and the other terminal of said motor'field is connected to the fixed contact I43 by a wire I49. The fixed contact I42 is connected to a negative main I50 to the negative main I09, by wires I55, I26 and I08, and the other terminal of coil I46 is connected to a fixed contact I56 of a tripping coil contactor switch mechanism I51, by a wire I58.

The relay controlled switch mechanism I53 comprises a solenoid coil I6I, one terminal of which is connected to the negative main I09, by wires I62 and I08, and the other terminal 01 which coil is connected to a wire I63, by a wire I64 (see Figs. 1 and 4).

The coil I6I actuates movable contacts I66, I61 and I68. When the solenoid is deenergized its core will be down so that the movable contact I61 connects the pair of fixed contacts I52 and I69, and the movable contact will also connect the pair of fixed contacts I10 and "I. The movable contact I66 will be disengaged from the pair of fixed contacts I12 and I13.

As shown in Figs. 1 and 3, the opening motor contactor comprises a relay controlled switch mechanism I16, having .a solenoid coil I11 for actuating a plurality of movable contacts I18, I19 and I80.

One terminal of the coil I11 is connected to the fixed contact I1I of the switch mechanism I53, by wires 285 and I8I.

The other terminal of the coil I11 is connected to a fixed contact I82 of a pressure switch interlock device I83, by a wire I84.

When the solenoid I11 is energized the movable contacts I18, I19 and I80 connect the pairs of fixed contacts I85, I86 and I81, I88 and I89, I90, respectively. The solenoid I11 is shown in deenergized position in Fig. 3.

The fixed contact I85 is connected to the fixed contact I10, by a Wire I9I.

The fixed contact I86 is connected to the positive main I03, by a wire I92.

The fixed contact I81 is connected to the negative main I09, by wires I93 and I94.

Thefixed contact I88 is connected to one terminal of the motor 16, by wires I95 and I 96.

The fixed contact I89 is connected to the positive main I03, by a wire I91.

The fixed contact I90 is connected to a terminal of the motor 16, by a wire I98 (see Figs. 1, 2 and 3).

' The pressure switch interlock device I83 is, as shown in Fig. 1, connected to the pressure. side of the pump II, between said pump and the valve I3, so that fiuid pressure can be used for operating the movable contact 20I 01 said device. When the pump II is inactive the movable contact 20I will be disengaged from the fixed contacts I82 and 202. When the pump II is started, the valve I3 will be closed. Therefore, as pressure is built up in the section of the conduit between the pump II and the valve I3, such pressure will actuate the pressure switch interlock device I83 and the movable contact 20I $01121 be engaged with the fixed contacts I82 and The fixed contact 202 is connected to a fixed contact 203 of a limit switch device 204, by a wire 205 (see Figs. 1 and 2).

The movable arm or the limit switch 204 is (332111806861 to the negative main I09, by the wire Associated with the limit switch 204, is another limit switch201 comprising a pair of connected switch arms 208 and 209.

The switch arm 208 is connected to the wire I94, by a wire 2I0, and the switch arm 209 is connected to one terminal of the coil 2I9 of the relay controlled switch mechanism 220, by a wire 2 (see Figs. 1, 2 and 3).

During the operation of the device the switch arm 208 is adapted to engage a fixed contact 2I2, which is connected to one terminal of the coil 2I3 of a solenoid associated with the actuating member 69, by a wire 2. The switch am 209 at the same time is adapted to engage a fixed contact 2I5, which is connected to the Wire 2I0, by a wire 2I6, as shown in Fig. 2.

The limit switches 204 and 201 are actuated by the arm 11.

The switch mechanism 220 comprises a plurality of movable contacts 22I, 222, 223 and 224 adapted to be operated by the relay 2I9 (see Fig. 3).

The movable contact 22I is adapted to engage the fixed contacts 225 and 226. The contact 225 is connected to the wire 221 which connects a terminal of the coil 2I9 with the wire I63, by a wire 228, and the contact 226 is connected to the positive main I03, by wire 229.

The movable contact 222 is adapted to engage the fixed contacts 230 and 23I. The contact 230 is connected to the wire I96, by a wire 232, and the contact 23I is connected to the negative main I09, by a wire 233.

The movable contact 223 is adapted to engage the fixed contacts 234 and 235. The contact 234 is connected to a terminal of the motor 16, by a wire 236. The contact 235 is connected to the positive main I03, by awire 231. I

The movable contact 224 is adapted to engage the fixed contacts 238 and 239. The contact 238 is connected to one terminal of the solenoid coil 240 oi a timing relay 2, by a wire The contact 239 is connected to the posi 242. tive main I03 by a wire 243.

The other terminal of the solenoid coil 240 is connected to the negative main I09, by wires 244 and 245.

Operated by the coil 240 is a switch comprising a movable contact 246 and a pair of fixed contacts 241 and 248, adapted to be connected by the movable contact 246 when the coil 240 is energized.

The fixed contact 241 is connected to the wire I54, by a wire 249 (see Figs. 1, 3 and 4), and the fixed contact 248 is connected to a wire 250, by a wire 25I.

One end of the wire 250 is connected to the wire 242, and the other end of the wire 250 is connected to a terminal of a timing motor 252.

The shaft 253 of the motor 252 has fixed thereto a gear 254 which is in meshing relationship with a gear 255 having threaded connection with the stem 256 of a switch device 251.

The stem 256 carries a pair of contacts 258 and 259, which are moved by said stem when the motor 252 operates.

In one extreme position of the switch 251, the movable contact 258 connects the pair of fixed contacts 26I and 262 and the movable contact 259 is disengaged from the pair oi fixed contacts 263 and 264, and in the other extreme position of the switch 251 the reverse takes place; namely, the movable contact 258 is disengaged from the fixed contacts 26I and 262, and the movable contact 259 connects the fixed contacts 263 and 264.

The fixed contact 26I is connected to the wire 245, by a wire 265, and the fixed contact 262 is connected to a terminal of the motor 252 by a wire 266.

The fixed contact 263 is connected to one terminal of the solenoid coil 261 of the tripping coil contact switch mechanism I51, by a wire 268. The other terminal of the coil 261 is connected to the negative main I09, as shown in Fig. 3.

The fixed contact 264 is connected to the wire.

250, by a wire 269.

The solenoid coil 261 of the switch mechanism I51, is adapted to operate a pair of movable contacts 21| and 212.

The movable contact 21| is adapted to engage the pair of fixed contacts I56 and 213, and the movable contact 212 is adapted to engage the pair of fixed contacts 214 and 215.

The fixed contact 213 is connected to the positive main I03 by a wire 216.

The fixed contact 214 is also connected to the positive main I03 by wires 211 and 216.

The fixed contact 215 is connected .to a terminal of the solenoid coil I02, by a wire 218.

When it is desired to start the motor 8| of the pump II, the manually controlled push button switch I05 is operated. This closes the circuit by which the solenoid coil |0.I is energized, from the positive main I03, through the coil IOI, wire I04, switch I05, wire I06, contacts H4, H2 and N5 of the interlock switch device I01, wire I08, and the negative main I09.

When the solenoid coil I 0| is energized, the main switch mechanism 88 will be operated and the movable contacts 95, 96, 91 and 98 will engage the pairs of fixed contacts 85, 89 and 86, 90 and 81, 9| and 99, I00, respectively. Three phase electric energy ,will then be supplied to the pump motor 8| from the main conductors 82, 83 and 84, through the main conductors 92, 93 and 94, respectively.

Since the movable contact 98 engages the fixed contacts 99 and I00 when the coil IN is energized, the coil I29 of the time delayed relay switch I28 will also be energized. After a predetermined time interval, during which the main pump motor 8| approaches synchronous speed, the movable contact I21 engages the fixed contacts I33 and I34. An electric circuit is then closed by which the closing coil I36 of the motor field switch mechanism I31 is energized, from the positive main I03, through wires I3I, I35, contacts I34, I21 and I33, wire I38, coil I36, wires I39, I26 and I08, and the negative main I08 (see Fig. 5).

When the solenoid coil I36 is energized the motor field switch I31 is closed, thereby supplying electric energy to the motor field I41, from the positive main I48, through the coil I41, wire I49, contacts I43, I40 and I42. and negative main I50.

After the pump II is initially started, and before the valve plug I5 opens, the pressure switch device I83 is operated by the increase in pressure of the fluid in the pipe line on. the pressure side at the pump I I, so that the movable contact 20l engages the fixed contacts I82 and 202.

At the same time the electric circuit is closed through the contacts I44, I and I45 oi! the switch I31, by which the coil I11 oi! the motor switch mechanism I16 is energized. Said coil I11 is energized from the positive main I03, through wire I5I, contacts I44, I and I45, wire I54, contacts I52, I61 and I68, of the auxiliary relay switch mechanism I53, wire 28I, contact 282, switch 283, wires 284, 285, coil I11, wire I84, contacts I82, 20I and 202, wire 205, limit switch 204, wire I94, and negative main I09.

When the coil I11 is energized the movable contacts I18, I18 and I will be moved upwardly into engagement with the pairs of fixed contacts I85, I86 and I81, I88 and I89, I90, respectively, thereby closing an electric circuit of the reversing motor 16,,trom the positive main I03. through wire I81, contacts I89, I80 and I90, wire I88 to one terminal of the motor 16, and from another terminal of said motor through wires I96, I85, contacts I88, I18 and I81, and wires I83 and I94, to the negative main I09.

When the motor 16 is thus operated, the drum 14 will be rotated inthe direction or the arrow, Fig. 2, and the cable 13 wound up on the drum.

As the cable 13 is drawn upwardly and wound around the drum 14, the pulley 18 will be lifted, and, through the medium of the spring 19, the lever 61 will be moved upwardly about the inicrunr provided by the pivot 68.

In the upward swinging movement of the lever 61, the plunger 36 of the pilot valve device 22 is pul ed upward an amount suflicient so that the h d 31 uncovers the port 45, thereby connecting the pressure chamber 40 with the chamber 41 of the control valve 2|, through passage 48.

Fluid under pressure from the supply tank 55 will thus be supplied to the chamber 41. At the same time the chamber 49 on the underside of the piston 25 will be connected to the sump tank 59, through passage 5|, chamber 4|, passage 83. and pipe 62.

In this way the piston 25 will be forced downwardly by the fluid under pressure thus supplied to chamber 41, and consequently the plunger 24 will move downwardly so that the heads 26 and 21 uncover the ports 3| and 34.

When the port 3| is uncovered, the piston chamber 30 will be connected to the sump tank 58, through pipe 32, chamber 52, passage 64 and pipe 62.

Fluid under pressure will, at the same time, be supplied to the piston chamber 33 from the pressure tank 55, through pipe 56, passage 58, chamber 53, port 34, and pipe 35.

In this way the piston I9 is actuated to operate the valve plug mechanism and effect rotation of the plug I4 from closed towards open position.

As the piston I9 (Fig. 1) moves towards the right, the slack in the cables 10 and 13 is taken up, since the cable 13 is being wound around the drum 14. The weight I23 will, at the same time,

pull the bar I20 of the interlock switch device I01, towards the right, therebymoving the opening I2I out of registration with the stern of the actuator I28.

Since the lever 81 functions as a floating lever.

' the fulcrum provided by the pivot 88 is not fixed,

and this fulcrum moves downwardly when the control valve plunger 24 is moved downwardly in the manner above described. The cam member 1| also moves towards the right from the position shown in Figs. 1' and 2, and since the tautness of the cable 13 is reduced by the movement to the right of the piston I9, the end portion of the lever 81, to which the spring 19 is attached will also move downward gradually, and consequently the plunger 38 of the pilot valve 22 will be lowered. In this way the supply of fluid under pressure to the piston chamber 33 will be controlled in such a manner that the valve plug I4 will not be rotated towards open position any faster than the speed at which the reversing motor 18 permits operation to take place.

During the movement of the piston I9 from valve closed towards valve open position, the arm 11 is carried by the cable 13 from the position shown in Fig. 2 towards the right.

When the valve plug I4 has thus been rotated to its wide open position, the arm 11 engages the depending end of the limit switch 204 and moves said switch towards the right anamount sumcient to disengage the switch 204 from the contact 203. In this way the electric circuit of the motor 18 will be opened, so that no further operation 01' said motor takes place. The relative positions of the plungers 24 and 38 of the control valve 2I and the pilot valve 22, respectively, will at this stage of the operation of the apparatus be the same as shown in Fig. 2, and consequently with the ports 3|, 34, 45 and 80 lapped, the fluid under pressure supplied to piston chamber 33 will be bottled up and the piston I9 will be retained in valve open position.

The valve I3 can be closed by two methods, one of which is adapted to operate under normal conditions, and the other method can be used when an emergency condition arises.

For normal closing of the valve I3, there is provided a series of controls, comprising a push button switch 288, and a plurality oi. automatically operable auxiliary switches 281, 288 and 289.

Any number of auxiliary automatically operable switches, such as the switches 281, 288 and 289 may be employed. These switches are placed in parallel and are electrically connected with the auxiliary relay switch mechanism I53, as shown in Fig. 4.

A contact 290 of the push button switch 288 is connected to the positive main I03, by a wire 29I. The other contact 292 is connected to the wire I63. i

A contact 293 of the switch 281 is connected to the wire 29I, by a wire 294. The terminal 295 of said switch 281 is connected to the wire I83, by a wire 296.

A contact 291 of the switch 288 is connected to the wire 294, by a wire 298, and the terminal 299 of said switch 288 is connected to thewire 298. by a wire 300.

A contact 30I of the switch 289 is connected to the wire 298, by a wire 302, and the terminal 303 of said switch 289 is connected to the wire 300. by a wire 304.

When either of the switches 288, 281, 288 or 289 are operated to close their respective contacts, the solenoid coil I8I of the auxiliary relay switch mechanism I53 will be energized from the positive main I03 through the wire 29I, through either of the closed switches 288, 281, 288 or 289, to the wire I83, then through the wire I84, coil I8I, and the wires I82 and I08, to the negative main I09.

When the solenoid coil I6I is thus energized. the switch mechanism I53 willbe operated and the movable contacts I81 and I68 thereof will be disengaged from the pairs of fixed contacts I52, I89 and I10, I1I, respectively. At the same time the movable contact I86 will engage the fixed contacts I12 and I13. Electric current from the positive main I03 will then be supplied to the coil I8I, through the wire I5I, contacts I44, HI and I45, the wires, I54 and 249, the contacts I12, I68 and I13, the wires I63 and I84, coil I8I,

and the wires I82 and I08, to the negative main I09. Inthis way the coil I8I remains energized after either of the switches 286, 281, 288 or 289 return to the open position shown in Fig. 4, until the switch device I31 is operated in the manner to be hereinafter more fully described to effect deenergization of the coil I8I.

At the same time that the solenoid coil I8l is energized in the manner heretofore described. the solenoid coil 2I9 of the switch mechanism 220 (Fig. 3) will also be energized, through the electric circuit including the positive main I03, wire 2!". either of the closed switches 288, 281, 288 or 289, the wires I83 and 221, the coil N9, the wire 2| I, switch 209, which now engages the fixed contact 2I5, the wires 2I8, 2I0 and I94, and the negative main I09.

When the solenoid coil H9 is thus energized I the switch mechanism 220 will be operated and the movable contacts MI, 222, 223 and 224 thereof will engage their respective fixed contacts (see Fig. 3).

The motor 18 will then be supplied with electric energy through the electric circuit including the positive main I03, wire 231, contacts 235, 223 and 234, Wire 238 to one terminal-of the motor 18, and from another terminal of said motor, through the wires I96 and 232, contacts 230, 222 and 23I, and the wire 233 to the negative main I09.

In this way the motor 18 is caused to operate in a reverse direction to the direction in which it is operated during the opening of the valve plug I4, and consequently the drum 14 will rotate in the direction opposite to the direction of tlge arrow, Fig. 2, thereby unwinding the cable 1 As the tension of the cable 13 is thus slackened the outer free end of the lever 81 swings down- :vardly on the fulcrum provided by the pivots In the downward swinging movement of the lever 81, the plunger 38 of the pilot valve device 22 is moved downward an amount suflicient so that the heads 31 and 38 uncover the ports 45v that the heads 26 and 21 uncover the ports 3| and 34.

When the port 34 is uncovered, the piston chamber 33 will be connected to the sump tank 59, through pipe 35, chamber 54, passage 65 and pipe 62.

Fluid under pressure will, at the same time, be supplied to the piston chamber 30 from the pressure tank 55, through pipe 56, passage 68, chamber 53, port 3|, and pipe 32.

The piston I9 is then actuated to operate the valve plug mechanism and effect rotation of the plug I4 from open towards closed position.

As the piston I! (Fig. 1) moves towards the left the cam member H is pulled towards the left and, at the same time, the slack in the cable 13, due to the unwinding of the cable from the drum 14 by the motor 16, is taken up. Also the bar I20 is pulled towards the left to the position shown in Fig. 1.

Since the lever 61 functions as a floating lever, the fulcrum provided by the pivot 68 is not fixed, and this fulcrum moves upwardly when the control valve plunger 24 is moved upwardly in the manner above described. The tautness of the cable 13 during the movement of the piston I9 from right to left (Fig. 1) is such that the end of the lever 61 to which the pulley 18 is attached will gradually move downwardly so that the plunger 36 of the pilot valve 22 will be kept in the lowered position in which the ports 45 and 50 are uncovered by the heads 31 and 36, respectively, an amount to supply fluid under pressure to the chamber 49 so as to maintain the plunger 24 raised. In this way the supply of fluid under pressure to the piston chamber 30 will be controlled in such a manner that the valve plug I4 will not be rotated towards closed position any faster than the speed at which the motor 16 per- V mits the operation to take place.

As the valve plug I4 turns towards closed position, the member H is pulled by the cable 10 towards the left. The relative position and contour of the cam surface 12 of the member H is such that during the initial operation of the control valve 21 the plunger 24 moves upwardly unrestrictedly an amount suflicient to permit as fast closing of the valve plug I4 as the motor 16 operates. However, during the final portion of the turning movement of the valve plug I4 towards closed position, the cam surface 12 engages the upper end of the plunger 24, thereby moving the piston heads 26 and 21 downwardly so as to partly lap the ports 3| and 34, respectively. This results in a gradual decrease in the speed or rate of closing movement of the valve plug, since the amount of fluid under pressure supplied to piston chamber 30 will be gradually reduced.

During the movement ofthe piston I9 from valve open towards valve closed position, the arm 11 is carried by the cable 13 away from engagement with the limit switch 204 and shifted towards the left so that when the valve plug I4 has been rotated to closed position, the arm 11 engages the depending end of the switch arm 208 and moves the limit switch 201 towards the left to the open position shown in Fig. 2. In this way the electric circuit of the motor 16 will be opened,

so that no further operation of said motor takes 50 lapped, the fluid under pressure supplied to piston chamber 30 will be bottled up and the piston I9 will be retained in valve closed position.

When the valve plug l 4 is fully closed and limit switch 201 opened in the manner above described, the circuit through which electric current is supplied to energize the solenoid coil 2 I 9 of the switch mechanism 220 will be opened, so that the solenoid of said switch mechanism will be deenergized. The movable contacts 22!, 222, 223and 224 will then move away from their respective fixed contacts to the position shown in Fig. 3, thereby opening the circuit through which electric current is supplied to the motor 16,-so that said motor stops operating.

When the electric switch mechanism 220 is closed in the manner above described at the initiation of the normal valve closing operation, and movable contact 224 engages the fixed contacts 238 and 239, an electric circuit is closed whereby the solenoid coil 240 of the timing relay 2 is energized from the positive main I03, through wire 243, contacts 239, 224 and 238, wire 242, solenoid coil 240, and thence through wires 244 and 245 to the negative main I09 (see Figs. 1 and 3).

It will, therefore, be noted that bus A in the timing relay 2 is energized with positive electric current. The bus A is originally energized with electric current through the circuit including the contact 224 of the switch mechanism 220 and is held in place by its own contact 246 as long as the field switch I31 is energized.

When the solenoid coil 240 is thus energized, the movable contact 246 of the timing relay 2 is contacted with the fixed contacts 241 and 243, thereby closing an electric circuit through which the timing motor 252 is supplied with electric current from the positive main I03, through wire I5I, contacts I 44, MI and I 45 of the field switch I31, wires I54, 249, contacts 241, 246 and 246 of the timing relay 2, and wires 25I and 250 to one terminal of the electric motor 252, and thence from the other terminal of said motor through the wire 266, contacts 262, 258 and 26I, and wires 265 and 245, to the negative main I09 (see Figs. 1, 3, 4 and 5).

The motor 252 operates the gear 255 so that thecontacts 258 and 259 are moved, contact 258 being disengaged from the fixed contacts 26I and 262, and contact 259 being engaged with the fixed contacts 263 and 264.

The relation of the contact 258 with the contacts 26I and 262 and the contact 259 with the contacts263 and 264 is such that during operation of the motor 252 in the above described manner, the movable contact 259 engages the contacts 263 and 264 just before the movable contact 256 is disengaged from the contacts 26I and 262.

As soon as the electric circuit of the motor 252 is opened by the movable contact 258 being moved away from the contacts 26I and 262, the motor will cease to operate.

However, when the movable contact 259 engages the contacts 263 and 264 an electric circuit is closed through which current is supplied from the positive bus A of the timing relay 24 I through wires 250 and 269, contacts 264, 259 and 263, and wire 268, to one terminal of the tripping coil 261, and from the other terminal of coil 261 to the negative main I09 (see Fig. 3). In this way the solenoid coil 261 is energized so that movable contacts 21l and 212 are engaged with the fixed contacts 213, I56 and 212 and 214, respectively, of the tripping coil switch mechanism I51.

positive main I03, through wire 216, contacts 213, 2H and I66, wire I60, solenoid coil I46, and wires I56, I26, and I06, to the negative main I09.

When the contact 212 of the tripping switch mechanism I61 engages theflxed contacts 214 and 215, an electric circuit is closed from the positive main I03, through wires 216, 211. contacts 214, 212 and 21!, wire 216, solenoid coil I02, and wires I26 and I00, to the negative main I09.

r The solenoid coils I02 and I46 are thus energized so that the main switch mechanism 04 and the motor field switch mechanism I31 are both operated to open the respective motor circuits controlled thereby. In this way the operation of the pump motor 6| is halted, and the pump II ceases to function. y The opening of the motor field switch mechanism I31 in the manner above described, disenthen drops, with the result that contact 246 is disengaged from the contacts 241 and 246. This opens the circuit through which electric current is supplied to the timing motor 262, and consequently the operation of said motor is halted. Said motor is adapted to be automatically reset for another operation.

When the timing relay 24l is operated in the above described manner, the circuit through which electric current is supplied to solenoid coil |6| of the switch mechanism I63, so as to hold said coil energized as has been described, is opened, thereby 'deenergizing the coil I 6| and permitting said switch mechanism to return to the position illustrated in Fig. 4, thereby placing the system in position for normal opening for the next operation.

Connected to one end of the solenoid coil 2|3 (Figs. 1 and 2) is a wire 3| I, which leads to as many controls as may be desired for the purpose of effecting a quick closing of the valve I3 and stopping of the pump II, when an emergency condition arises in the system.

A contact 3|2 of the push button switch 3" is connected to the positive main I03. The other contact 3 of the switch 3|3 is connected to thewire 3|I.

In addition to the push button switch 3|3, there may be any number of automatically openable emergency switches, such as the switches The switch 3| 5 may be so constructed as to operate automatically under emergency overload conditions.

The switch 3| 6 may be adapted to operate automatically under emergency conditions resulting from overheated bearings of the apparatus.

The switch 3 I 1 may be adapted to operate automatically when the voltage of the electric current supplied to the systemdecreases a predetermined amount.

Eitherof theswitches 3|3, 3I6, 3|6 or 3|1 when closed, is adapted to close an electric circuit through which the solenoid coil 2|3 is energized from the positive main I03, through the wire 3| I, coil 2|3, wire 2, switch 206, which is closed when the valve plug I4 is'in open position, wires H0 and I94, and the negative main I03.

When the solenoid coil 2|3 is thus energized, the member 69 is pulled downwardly by the solenoid of said coil. In this movement the lateral upper end of the member 69 engages the'free end of the lever 61 and swings said lever downwardly about the fulcrum provided by pivot 66. Spring 18 is expanded somewhat by the downward swinging movement of lever 61.

A latch 301 engages the upper end of the member 69, when the lever 61 has thus been swung downwardly a predetermined amount, and retains the member 69 and said lever in lowered position.

The pilot valve22 is operated by the lever 61 in the manner heretofore described so that the the control valve device 2| is actuated and the plunger 24 thereof raised to its maximum position, permitting fast operation of the valve plug I4towards closed position.

As the valve plug I4 turns towards closed position, the member 1|. is pulled by the cable 10 towards the left so that when the plug I4 is nearly closed the cam surface 12 of the member 1| engages the upper end of the plunger 24, thereby moving the piston heads 26 and 21 of the cont=rol valve downwardly so as to partly lap the ports 3| and 34, respectively. This results in a gradual decrease in the rate of.closing movement of the valve plug for the last portion of the turning movement of the plug. In this way the plug is not jammed tight against its seat in the valve casing to cause injury to the parts of the mechanism.

When the valve plug I4 is fully closed the limit switch 201 will have been moved to its open position by the arm 11 in the manner heretofore described, thereby deenergizing the solenoid coil 2|3.

As shown in Fig. 4, additional switches MI, 322 and 323, may be connected to the several electrical circuits heretofore describedrso as to provide auxiliary controls for the apparatus.

In a valve control mechanism embodying the present invention installed in the aqueduct between Parker Dam on the Colorado River and the cityof Los Angeles, State of California, tests have been conducted to determine the actual time to effect closing of the valveplug under normal operating conditions of the mechanism as described above, and also under fast or emergency operating conditions. These tests have disclosed the fact that under normal conditions the valve operating mechanism is controlled so as to eifect closing of the valve plug in approximately forty seconds, while during closing operation of the valve plug under emergency conditions obtained by energizing the solenoid coil 2|3, the average time to close the valve plug was approximately five seconds.

Having thus described my invention, what I claim is:

1. The combination with a fluid conduit having a main valve therein for opening and closing said conduit, power operated means for operating said valve. and electrical control mechanism for said power means responsive to fluid flow conditions in said conduit.

2. The'combination witha fluid conduit having a main valve therein for opening and closing said 3. The combination with a fluid conduit having a main valve therein for opening and closing said conduit, power operated means for operating said valve, an electric motor driven pump for pumping fluid through said conduit, and control mechanism for said power means and said pump responsive to fluid flow conditions in said conduit.

4. The combination with a fluid conduit having a main valve therein for opening and closing said conduit, power operated means for operating said valve, an electric motor driven pump for pumping fluid through said conduit, and electrically operable control mechanism responsive to fluid flow conditions in said conduit for said pump and said power means.

5. The combination with a fluid conduit having a main valve therein for opening and closing said conduit, power operated means for operating said valve, an electric motor driven pump for pumping fluid through said conduit, electrical switch means for controlling the operation of said pump, electrical switch means for controlling the operation of said power means, and means communicating the pressure in said conduit at the upstream side of said main valve to control the operation of electrical means adapted to interconnect said pump electrical switch means with said power electrical switch means.

6. The combination with a fluid conduit having a main valve therein for opening and closing said conduit and power operated means for operating said valve, of an electric motor driven pump for pumping fluid through said conduit, automatic control mechanism for said power means comprising a fluid pressure actuated member having a valve opening pressure chamber at one side thereof and a valve closing pressure chamber at the other side thereof, means for supplying fluid under pressure to said chambers, electrical control mechanism for said pressure supplying means, and means normally inactive when said pump is inactive and responsive to fluid flow conditions in said conduit at the upstream side oi. the main valve for controlling said electrical control mechanism.

'7. The combination with a fluid conduit having a main valve therein for opening and closing said conduit and power operated means for operating said valve, of an electric motor driven pump 'for pumping fluid through said conduit, control mechanism for said power means comprising a fluid pressure actuated member having a valve opening pressure chamber at one side thereof and a valve closing pressure chamber at the other side thereof, means for supplying fluid under pressure to said chambers, electrical control mechanism for said fluid pressure supplying means, and means responsive to fluid flow conditions in said conduit at the upstream side of the main valve for controlling said electrical control mechanism, said fluid flow responsive means being active to flow in the conduit only when said pump is in operation.

8. The combination with a fluid conduit, an electric motor driven pump for pumping fluid through said conduit, a main valve in the conduit for opening and closing the conduit, means for operating said valve, control mechanism for said valve operating means, electrical means for said control mechanism, means responsive to fluid flow conditions in said conduit for controlling said electrical means, and means for interconnecting said electrical means with the pump motor.

9. The combination with a fluid conduit, an electric motor driven pump for pumping fluid through said conduit, a main valve in the conduit for opening and closing the conduit, means for operating said valve, control mechanism for said valve operating means, an electric motor therefor, mechanism to connect said motor to a source of supply, a relay responsive to interrupt said connection, said relay having an operating winding connected in circuit with said motor to effect response thereof under given current conditions, and means associated with said relay to prevent response thereof under given positions of said main valve.

10. The combination with a fluid conduit, an electric motor driven pump for pumping fluid through said conduit, a main valve in the conduit for opening and closing the conduit, means for operating said valve, control mechanism for said valve operating means, means associated with said control mechanism and adapted to be driven into a definite limit, an electric motor for driving said associated means, a line switch mechanism for connecting said motor to a source of supply and having electromagnetically operated means associated therewith for holding the same in closed position, a relay responsive to render the holding means ineffective under given current conditions in the motor circuit, and means associated with said relay to control operation thereof under predetermined positions of said valve during movement thereof.

11. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, means for controlling the current supply to said pump motor, and means operative when said pump motor is active for controlling the operation of said valve operating mechanism.

12. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, means for controlling the current supply to said pump motor for initiating operation of said pump motor when said valve element is in closed position, means operative only when said pump motor is operating for controlling the operation of said valve operating mechanism to eiTect movement of said valve element from closed towards open position, means for controlling the operation of said valve operating mechanism to effect movement of said valve element from open towards closed position, and means operative at the conclusion of the valve closing movement for opening the electric circuit through which current is sup-- 14. The combination comprising a conduit having a movable valve element therein for con- 6o tric switch inoperative when trolling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, means for controlling the current supply to said pump motor for initiating operation of said pump motor when said valve element is in closed position, means operative onlywhen said pump motor is operating for controlling the operationof said valve operating mechanism, and means operatively connected to the valve operating mechanism for preventing closing of the electric circuit through which current is suppliedto said pump motor.

15 The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, means for controlling the current supply to said pump motor for initiating operation of said pump motor when said valve element is in closed position, means operative only when said pump motor is operating for controlling the operation of said valve operating mechanism, and a manually operable electric switch operatively connected to the valve operating mechanism for also controlling the.

electric circuit through which current is supplied to said pump motor.

16. The combination comprising a conduit having a movable valve elementtherein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, means for controlling the current supply to said pump motor, means for controlling the operation of said valve operating mechanism, a manually operable electric switch for also controlling the current supply to said pump motor, andmeans operatively connected to the valve operating mechanism for preventing operation of said manually operable electric switch when said valve element is in open position.

17. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, means for controlling the current supply to said pump motor, means for controlling the operation of said valve operating mechanism, a manually operable electric switch operable only when said valve element is in closed position for also controlling the current supply to said pump motor, and means oper atively connected to the valve operating mechanism for rendering said manually operableelecsaid valve element is in open position.

18. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mecha- 55 nism for operating said valveelement, an electric motor driven hydraulic pump for pumping fluid through said conduit, and means operable by the pressure of fluid in said conduit between a the pump and said valve element for controlling 70 operation of said valve operating mechanism.

nism for operating said valve element, an elecfB tric motor driven hydraulic pump for pumping element for controlling the fluid through said conduit, electrically operated means for controlling the operation of said valve operating mechanism, and an electrical switch mechanism operable by the pressure of fluid in said conduit between the pump and said valve operation of said electrically operated means.

20. The, combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adaptedto control fluid flow therethrough, actuating means for moving saidvalve element in opposite directions including a fluid pressure operated abutment, means for controlling fluid pressure to effect operation of said abutment, a floating lever controlling the operation of said fluid pressure controlling means, and means operatively connecting said floating lever with said abutment.

21. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite directions including a fluid pressure operated abutment, a source of fluid under pressure, means for controlling fluid flow from said source to said abutment, a floating lever controlling the operation of said controlling means, and means operated by said abutment for actuating said floating lever. a

"22. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite directionsincluding afluid pressure operated abutment, means for controlling fluid pressure to effect operation. oi! said abutment, a floating lever controlling the operation 01' said fluid pressure controlling means, a reversible electric motor, a drum operated by said motor, a. cable connecting said abutment with said drum, a cam operated by said cable for actuating said floating lever, resilient means also connecting said floating lever with said cable and disposed in spaced relation to said cam, and means for controlling the operation of said electric motor.

23. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite directions including a fluid pressure operated abutment, means for controlling fluid pressure to effect operation of said abutment, a floating lever controlling the operation of said fluid pressure controlling means, a reversible electric motor, a drum operated by said motor, a cable connecting said abutment with said drum, means operatively connecting the cable with said floating lever, means for controlling the operation of said electric motor, and means operable independent with respect to said motor for actuating. saidfloating lever.

24. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for movingsaid valve element in opposite directions including a fluid pressure operated abutment,

drum operated by said motor, a cable connecting said abutment with said drum, means operatively connecting the cable with said floating lever, means for controlling the operation of said electric motor, and means carried by the cable for limiting the operation of said electric motor.

25. The combination in a valve mechanism comprising a valve casing. a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite directions including a fluid pressure operated abutment, means for controlling fluid pressure to eflect operation of said abutment, means for controlling the operation 01' said fluid pressure controlling means, an electric motor, means operatively connecting said motor with said abutment, and means for simultaneously controlling the operation 01' said controlling means and said motor.

26. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite directions including a fluid pressure operated abutment, means for controlling fluid pressure to effect operation of said abutment including a valve having a piston and a stem extending from the piston and a pilot valve for controlling fluid pressure to actuate said piston, a floating lever operatively connected to said piston stem and to said pilot valve, means for actuating said floating lever to effect actuation of said pilot valve, and means operatively connected with said abutment for actuating said piston stem to effect operation of said floating lever.

27. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in oppositedirections including a fluid pressure operated abutment, means for controlling fluid pressure to effect operation of said abutment including a control valve having a piston anda stern extending from the piston and a pilot valve for controlling fluid pressure to actuate said piston, a floating lever operatively connected to said piston stem and to said pilot valve, and means for actuating said floating lever.

28. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite direc tions including a fluid pressure operated abutment, means for controlling fluid pressure to eflect operation of said abutment, means for controlling the operation of said fluid pressure controlling means and including an electric motor operatively connected with said abutment, and means for controlling the operationof said motor.

29. The combination in a valve mechanism comprising a valve casing, a movable valve element disposed in said casing and adapted to control fluid flow therethrough, actuating means for moving said valve element in opposite directions including a fluid pressure operated abutment, means for controlling fluid pressure to eil'ect operation of said abutment, and a floating lever for controlling the operation of said fluid pressure controlling means.

30. A valve mechanism for a conduit comprising a casing and a movable valve element disposed therein adapted to control fluid flow therethrough, means for actuating said valve element including opening and closing fluid pressure chambers, a source of fluid under pressure, means for controlling fluid flow from the source of fluid under pressure to said chambers including a control valve and a pilot valve, a floating lever operatively connected to the control valve and to the pilot valve, and electrically controlled means for actuating said floating lever.

31. A valve mechanism for a conduit comprising a casing and a movable valve element disposed therein adapted to control fluid flow therethrough, means for actuating said valve element including opening and closing fluid pressure chambers, means for controlling fluid flow relative to said chambers including a fluid passage having a control valve disposed therein, means for operating said control valve, a floating lever operatively connected to said control valve and to said control valve operating means, and electrically controlled means for actuating said floating lever.

32. A valve mechanism for a conduit comprising a casing and a movable valve element disposed therein adapted to control fluid flow therethrough, means for actuating said valve element including opening and closing fluid pressure chambers, means for controlling fluid flow relative to said chambers including a fluid passage having a control valve disposed therein, fluid pressure means for operating said control valve, means for controlling fluid flow relative to said fluid pressure means, a floating lever operatively connected to said control valve and to said fluid pressure means, and means for actuating said floating lever.

33. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, electromagnetically operated means for controlling the current supply to said pump motor, and a relay switch mechanism operative when said pump motor is active for controlling the operation of said valve operating mechanism. v

34. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, electromagnetically operated means for controlling the current supply to said pump motor for initiating operation of said pump motor when said valve element is in closed position, relay switch mechanism operative only when said pump motor is operating for controlling the operation of said valve operating mechanism to effect movement of said valve element from closed towards open position, electric circuit controlling means for controlling the operation of said valve operating mechanism to effect movement of said valve element from open towards closed position, and means operative at the conclusion of the valve closing movement for operating the electromagnetically operated means of said pump motor control.

35. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven hydraulic pump for pumping fluid through said conduit, electromagnetically operated means for controlling the current supply to said pump motor for initiating voperation of said pump motor when said valve element is in closed position, relay switch mechanism operative only when said pump motor is operating for controlling the operation of said valve operating mechanism, and means operatively connected to the valve operating mechanism for controlling the electric circuit through which current is supplied to said pump motor.

36. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven pump for pumping fluid through said conduit, electromagnetically operated means for controlling the current supply to said pump motor for initiating operation of said pump motor, means for preventing initial operation of said electromagnetic means except when said valve element is in closed position, electric relay mechanism operative only when said pump motor is active for controlling the operation of said valve operating mechanism, and a manually operable electric switch operatively connected in a circuit of the valve operating mechanism control means to effect operation or said relay mechanism so as to initiate operation of the valve element towards closed position irrespective of conditions in the current supply of said pump motor.

37. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven pump for pumping fluid through said conduit, a set of contacts, means for efiecting the operation of said contacts when said valve element is in closed position for eflfecting operation of said pump during the starting of the apparatus, and means for effecting operation of said valve element to establish communication through the conduit when the pressure or the fluid in the conduit between the pump and said valve element has been built up to a predetermined amount.

38. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric motor driven pump for pumping fluid through said conduit, electrical contacts, means for effecting the operation of said contacts when said pump motor is operating for efl'ecting the operation of said valve element from open to closed position, and means controlled by the position of said valve operating mechanism for actuating said contacts to render said valve operating mechanism and said pump motor inoperative.

39, The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric circuit for controlling the operation of said mechanism, an electric motor driven pump for pumping fluid through said conduit, an electric circuit for said pump motor, and means for interconnecting said valve mechanism circuit with said pump motor circuit.

40. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric circuit for controlling the operation of said mechanism, an electric motor driven pump for pumping fluid through said conduit, an electric circuit for said pump motor, and means for interconnecting said valve mechanism circuit with said pump motor circuit so as to effect operation of the valve mechanism subsequent to the initiation of operation of the pump motor.

41. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric circuit for controlling the operation of said mechanism, an electric motor driven pump for pumping fluid through said conduit, an electric circuit for said pump motor, and mean for interconnecting said valve mechanism circuit with said pump motor circuit so as to eiiect operation of the valve mechanism subsequent to the initiation of operation of the pump motor when the valve element is in closed position to establish communication through the conduit after the pressure of the fluid in the conduit between the pump and the valve has been built up to a predetermined amount.

42. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric circuit for controlling the operation of said mechanism, an electric motor driven pump for pumping fluid through said conduit, an electric circuit for said pump motor, and means for interconnecting said valve mechanism circuit with said pump motor circuit so as to effect operation of the valve mechanism subsequent to the initiation or operation of the pump motor when the valve element is in closed position to establish communication through the conduit after the pressure of the fluid in the conduit between the pump and the valve has been built up to a predetermined amount and to efiect operation of the valve mechanism to effect closing of the valve irrespective of operating conditions 01' said pump motor.

43. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mech anism for operating said valve element, an electric circuit for controlling the operation of said mechanism, an electric motor driven pump for pumping fluid through said conduit, an electric circuit for said pump motor, and means for interconnecting said valve mechanism circuit with I said pump motor circuit so as to effect operathe valve element is in closed position to establish communication through the conduit after the pressure of the fluid in the conduit between the pump and the valve has been built up to a predetermined amount and to effect operation oi the valve mechanism to eifect closing of the valve irrespective of operating conditions of said pump motor, said means being eii'ective to open the pump motor circuit when the valve has moved to closed position.

44. The combination comprising a conduit having a movable valve element therein for controlling fluid flow through the conduit, mechanism for operating said valve element, an electric circuit for controlling the operation of said mechanism, an electric motor driven pump for pumping fluid through said conduit, an electric circuit for said pump motor, and means for interconnecting said valve mechanism circuit with said pump motor circuit so as to effect operation of the valve mechanism subsequent to the predetermined amount and to effect rapid opinitiation or operation of the pump motor when eration of the valve mechanism to efl'ect closing the valve element is in closed position to estabot the valve irrespective of operating conditions lish communication through the conduit after 01' said pump motor.

the pressure of the fluid in the conduit between the pump and the valve has been built up to a EUGENE C. BRISBANE. 

